| Application of subsecond rotation scan to helical CT for lung cancer screening. | |
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MedLine Citation:
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PMID: 16967780 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To clarify whether the benefit of a reduced effective scan width obtained using a smaller pitch outweighs the disadvantage of increased noise in the application of a subsecond helical CT to mass screenings for lung cancer. MATERIALS AND METHODS: Twenty-two helical CT scans of the lung were obtained in 11 healthy subjects using the following parameters: 1) scan 1 was performed at 120 kVp, 50 mA, 10-mm collimation, 1-second/rotation, helical pitch of 2.0; and 2) scan 2 was performed at 120 kVp, 50 mA, 10-mm collimation, 0.75-second/rotation, helical pitch of 1.5. Computer-generated nodules measuring 10 mm and 6 mm in diameter showing ground-glass opacity were superimposed on these images. The detectability of each nodule was evaluated by six blinded readers using ROC analysis. RESULTS: Detectability of the 6-mm nodules was significantly higher in scan 2 than in scan 1. Detectability of the 10-mm nodules was not significantly different between scans 1 and 2. CONCLUSION: The use of a smaller pitch by employing a subsecond rotation scan in a helical CT for lung cancer screenings improves the detection of small lesions without increasing either the scanning time or radiation dose. |
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Authors:
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Yoshine Mori; Shigeki Itoh; Mitsuru Ikeda; Akiko Sawaki; Koujiro Suzuki; Shingo Iwano; Hiroko Satake; Shoji Arahata; Toyohiro Ota; Takeo Ishigaki |
Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: Nagoya journal of medical science Volume: 68 ISSN: 0027-7622 ISO Abbreviation: Nagoya J Med Sci Publication Date: 2006 Jun |
Date Detail:
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Created Date: 2006-09-13 Completed Date: 2006-10-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0412011 Medline TA: Nagoya J Med Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 139-45 Citation Subset: IM |
Affiliation:
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Department of Radiology, Nagoya University Graduate School of Medicine, Japan. yoshine@jg7.so-net.ne.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Humans Japan Lung Neoplasms / radiography* Male Mass Screening Middle Aged Phantoms, Imaging Tomography, Spiral Computed / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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